After installing some applications (e.g. MS Communicator), the download status bar does not go away, but stays at 100%.

This is a known issue. If your application load screen becomes stuck at 100% and does not close down on its own, simply press the End or Start Key after the download indicator reaches 100%. The application being downloaded will not be impacted by this and will be successfully loaded.

Note: At any time, you can check that you have the latest software version for your phone. For instructions on how to check your software version and update your phone software, refer to Check for Updates.